Window construction



March 25, 194-7. DAAB 2,418fi34 WINDOW CONSTRUCTION FiledJun e 2, 1944 2 Sheets-Sheet l FIGE.

arch 25, 1947. DAAB 2,418,914

WINDOW CONS TRUCTION Filed June 2, 1944 I 2 Sheets-Sheet 2 Patented Mar. 25, 1947 OFF! CE WINDOW CONSTRUCTION Elmer L. Daab, University City, iMo. Application ..i'une 2, 1944. Serial No. 538,442

i'oiaim. (015139-72) .Thisinvention relates to windows, and with regard "to certain more specific features, to dou- "b'le-hung, counterbalanced windows.

Among the several objects of the invention maynloe noted the provision of a reliable lowcost, doublehongwindowoithe counterbalanced variety which is simple 'in design, installation and operation; the'provision of a counterbalanced Window of the 'class described which may be operated with or without counterbalancing; and the1provision-dfawindow of this class which in use presents agdod appearance. Otherobjects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and "arrangements of parts which will be exemplified in the Structures hereinafter "described, and the scope of the application of which will be indizatedin the following "claim.

" In the accompanying drawings, in which is illustrated-one of various possible embodiments of the invention,

Fig. -1 is a verticalsectionof the new window;

Fig. 2 is an-enlarg'edhorizontal section taken on line 2-2 of Fig. 1;

Fig. 3 is 'a vertical detailed section taken on line ii- 30i Fig, l;

Fig. 4 is a vertical *detailed section taken on lined- 3 "of Fig. -1;

Fig. '5 is 'adiagrammatic vertical section illustrating counterbalancing operation; and,

"Fig. 6 is a view similar to Fig. illustrating alterative unbalanced operation.

Similar referenze characters indicate corresponding parts throughoutthe several views of the'dra'wings.

The drawings show one side of a symmetrical window and Where parts are'duplicated, onlyone is shown, in order to avoid superfluity.

Referring now more particularly to Figs. 1 and 2,' numeral I generally indicates a hollow metal window frame composed of vertical :side iambs =3inwhic'h are grooved sections 5 and l, The vertical jambs 3 ar connected by a horizontal headj'anib 9 and by a hor'izontal loottom sill H. The outside of the head jamb 9 is extended-downward asa-weather head [3.

' "Within the head 'jamb 9 is a channel 55 held by flanges 15. On each side of the 'frame,within the channel I5 is an L-shaped bracket [7 carrying-pins IQ for sheaves 2i. On each bracket l? is a cover zt'fheld {tothe bracket H by the same pins that support the sheaves. Thus the entiresheaveiasse'mloly is nestedwithin thegenerally Ll-shaped construction or" the head jamb so that .ther areno"undesirable protuberances from the rectangular'outlineiof the frame. *Thus in installing th frame in a rectangular wall opening no local parts of the wall need to "be knocked out. The entire construction presents a rectangular outline which fitswithin the ordinary rectangular window recess left within a Wall,

Within the outer vertical recesses 5 slides "an outer upper metal window sash 2'5, carrying a window pane?! and'hav'ing "a lower meeting rail 29. In "the other or inner recesses 1 slides an "inner lower metal window sash 129:, carrying a pane 3'! 'andhavingan upper meeting rail 33. The rails 29 and 31 meet'at'weathersti lp '35 when thes'ashes are closed.

The upper sash isspacedinward from the depending weather *head i3 so that if this upper sash is lowered a short distance, withoutits top emerging from the head,flimited circulation of air may occur between the window and "the weather head without entry oirain orthe like. This'fact will again *be referred to in 'cennection I with another element of theinvention.

Bolted to the opposite ends of the head'memloer of the inner sash 29 are U-shaped pieces "35, each comprising a horizontal extension member and a bumper head extending upward therefrom within the respective groove 7 in the side jamb for cooperation with bumpers 3i carried on the head jamb. This cooperation occurs when the inner sash rises to the upper end ofitstravel.

Each vertical edge of each window is formed with flanges 39 whichextend intothe grooved portions '5 and 1, respectively (Fig. 2). These flanges 39 are grooved as indicated at M and carry spring Weatherstrip members 43 which cooperate with the frame recesses :5 and l.

The flanges 39 determine channel-shaped spaces 45 on each side of each sash. Each space 45 in the lower sash is used as a channel for a sliding weight 47 composed of a lead element it carried by a'bail 49. Into the head of the bail is screwed a thimble' 5| through whichis a hole for accommodating a stainless steel cord 53. One end ofthe cord is provided with a holding head 50 below the hole. The upper end of the thimble 5| is slotted as shown at so 'that'by means of a spanner tool, the thimble may beadjusted up and down in the bail 49. This determines the position of the weight 41 in the channel d5 with the top of the'bail just undermember 35. Each member 35 is provided with a circular'opening 54- which accommodates the upper end o'f thexthimble but does not accommodate the upper fiat portion 52 of the bail 49. Thus when the bail is adjusted with the flat portion 52 just under the opening 54, the lower inside sash may be supported by the bail and act as a counterweight for the outer window in all positions of both. It is to be understood that the weight in the parts 48 and 49 forming the sliding weight element 41, is not enough in itself to counterbalance the outer window but only enough to maintain suitable tension in the respective cord- 53, for reasons which will appear.

Each cord 53 passes up through an opening 51 in the head jamb 9 and channel I5, thence over the sheaves 2| and down through other openings 59 through said channel [5 and head jamb 9. The second reach of the cord 53 passes down to'a second thimble Bl where it is provided with a holding head or knots 55 below the thimble 5|. This thimble (ii is threaded into a fixed block 52 in the upper portion of the outer sash 25. The cord may move down through the thimble should it become necessary that it so move. As will appear, this requires that the inner sash be raised. This movement allows for tying the knot 64 and also take-up of any excess cord.

The connection produced by this second thimble 5| with the upper portion of the outer window 25 is fixed since block 52 is fixed (see Fig. 3) On the other hand, each thimble 5| is connected only to a weighted bail 49 (Fig. 4). It is on the bails 49 that the lower sash is supported. But the inner sash may be raised with respect to the weighted bails independently of counterweighting by the outer sash, provided the outer sash is not allowed to descend. Under such circumstances each weighted bail 49. slides relatively down its respective space 55 in the lower sash as vthe lower sash rises. This may be referred to as a lost-motion connection between the weighted bails and the lower sash.

In order to prevent the upper sash from decending, whenever this is desired it is provided with oppositely located, lower latch bolts 65. These cooperate with suitably located openings 51 in the jamb 3. Each opening 61 on each side of the jamb is at such an elevation that when the respective latch bolt 55 engages therewith, the

upper sash 25 is held up in closed position.

The lower sash is provided at its bottom sides with opposite latches 65 of the general type used on railway windows and the like. The bolts H of these latches cooperate with openings 13 in the vertical jambs 3. The cooperation is selective so that the inside sash may be locked down in its shut position, or locked in variouselevatedpositions.

Operation is as follows:

Alternative I :Latch bolts 65 of the upper sash may be released, in which event the weight of the outside sash 25 is applied to the cords 53 to counterbalance the inner sash. This is because of the engagement of the flatportions 52 of the bails 49 underneath the members 375.. Hence when the latches 59 on the lower sash are released, the lower sash maybe opened with counterbalancing by the outer sash. The outer sash at this time lowers.

In addition, if the latches 59 are engaged in any set of openings 13, both windows will be locked against further opening. The second setof openings 13 are at an elevation such that the upper edge of the outer sash 25 becomes located in the neighborhood of the loweredge of 'theweather head 13, but not out from under it. This allows e ventilation under the weather head [3 and over the outer sash without admitting rain or the like (Fig. 5).

The lower sash may also be raised to its other positions, including its upper limit wherein the member 35 engages the bumper 31. At this time the outer sash descends to its lower limit, functioning during the action of opening the window as a counterbalance for the inner sash.

Fig. 5 shows the opening operation under counterbalanced condition wherein the lower sash has been unlocked and raised to bring the upper sash down without having the upper edge of the latter pass the lower edge of said weather head 13. Under these conditions the windows are locked at 69. Both windows may of course be opened further than shown in Fig. 5 under the counterbalance conditions.

Alternative II.--If it is desired to have the window operate without counterbalancing, then before the opening operation is started, the latch bolts 65 of the upper sash are throwninto the openings 6'1 prior to lifting the lower sash. Then when the lower latches B9 on the inner sash are released and thi inner sash lifted (see Fig. 6), then there is no counterbalancing action on the inner sash by the outer sash." This is because the weight assemblies 41 remain stationaryin spaces 55 as the inner sash lifts. This stationary condition is indicated by the dotted lines inFig. 6. The inner sash is then held openby reclosing the latches 69 in connection with desired sets of the openings 13. The lost-motion action 'of the weights 4'! in the spaces 45 when the inner sash is lifted without counterbalancing, avoids snagging and looping of the cord 53. l

Closing of the window under either alternative I or II is done simply by pushing down the inner sash and allowing the latch 59 to catch in the lowermost opening 13.

It may be observed that the operator under the alternative II lifts the weight of the inner sash. If the inner sash is large and heavy,;-.it may be desired to use one of. the available window lifters now on the market for aid in lifting the unbalanced sash.

In view of the above, it will be seen that the invention has the advantage of the stated alternative counterbalanced or unbalanced operation, the latter allowing the upper sash to remain closed. Its construction is simple and it is easy to operate.

Furthermore, there are no projections beyond the limit of the Window frame so that there is no interference with easy erection within the openings usually prepared in a building for the purpose. Neither are there engineering problems in head construction such as are incidental to most other types of windows of this class: All operating mechanism is within the frame and may be installed in the factory. It will be noted in this connection that the weights 4'! operate within a space in the sash, and not within any space within the wall that needs to be prepared for it, other than adapting the opening in the wall to the entire frame structure of the present invention.

The compensating adjustments available at the thimbles 5| and Bi allow for obtaining counter- 70 balancing action through the movements of both constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

A double-hung window comprising a frame having a sill, vertical grooved side jambs and a head jamb, a bumper on the head jamb, an upper outer sash and a lower inner sash slidable in the grooves in said side jambs, said lower sash having a vertical channel in the side thereof, an extension member secured to the top of the lower sash over the channel, said extension member having an aperture communicating with the channel, a bumper head extending upward from the extension member and located within the respective groove in the side jamb for cooperation with the bumper on the head jamb, cord guide means in the head jamb, and a cord attached at one end to the upper sash, passing over said guide means and freely through said aperture, and attached at its other end to a weight freely movable in said channel, said weight having a portion wider than the aperture so that it cannot pass through said aperture.

ELMER L. DAAB.

REFERENCE S CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 15 2,257,123 Peremi Sept. 30, 1941 1,198,244 Linck Sept. 12, 1916 642,865 Hannum Feb. 6, 1900 333,287 Dellenbeck Dec. 2.9, 1885 10,957 Clark May 23, 1854 20 1,721,828 Mohun et a1. July 23, 1929 

